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parts of the integumentary system? skin, hair, nails, and glands
principle skin regions epidermis, dermis, hypodermis (SQ)
what is the most superficial region of the epidermis? corneum
what is the deepest region of the epidermis? basale
langerhaus cell: what is it and what does it do epidermal cell, responsible for immune function
merkel cell: what is it and what does it do? epidermal cell, responsible for sense of touch (tactile sensations)
What are the 6 functions of the integumentary system? 1. body temperature regulation 2.blood reservoir 3. protection 4.sensations 5. excretion/absorption 6. vitamin D3 synthesis/trans-dermal applications (TDA)
free nerve endings: what is it and what does it do? dermal structure, causes itching
corpuscles: what is it and what does it do? dermal structure, responsible for tactile sensations touch and pressure
UVA RAYS: describe wave length, penetration, and what it causes long wave length, dermal penetration, causes wrinkling
UVB RAYS: describe wave length and effects shorter wave length, genetic damage, drug warnings
describe the structural basis of skin color: melanin: brown, carotene: yellow-orange, hemoglobin: red
color diagnostic clues: cyanosis, color and reasoning blue skin, not enough oxygen getting around to tissues
skin color diagnostic clues: jaundice, color and reasoning yellow skin, high levels of bilirubin in blood
skin color diagnostic clues: erythema, color and reasoning red skin; heat, infection, inflammation, rash, burn, etc.
what part of the hair is dead and what part is alive? dead: shaft; alive: root, follicle, bulb, and plexi
what are the 2 hair growth stages? anagen: growing; telogen: resting
how minoxidil works with male patterned baldness (MPB) it blocks follicle from DHT attack
sebaceous gland: what is it, what does it secrete: skin gland, secretes an oily substance sebum
sudoriferous gland: what is it, what is it responsible for skin gland, sweat
ceruminous gland: what is it, what does it secrete? skin gland, cerumen (ear wax)
mammy gland: what is it, what does it secrete: skin gland, milk
functions of thermoregulation 1. sweat liberation (perspiration) 2. blood flow adjustments
4 ways the skin protects itself 1.keratin 2.lipids 4.pH 5.phagocytosis
what does the skin excrete? sweat, salt, CO2
what does the skin absorb? O2 and CO2, solvents, topicals
4 examples of trans-dermal applications: 1. birth control 2.smoking cessation 3.motion sickness 4. chest pain (angina)
name and describe the first step of deep wound healing? inflammation: a blood clot unites the edges of the wound.
name and describe the second step of deep wound healing? migratory:epithelial cells beneath the scab bridge the wound, fibroblasts begin scar tissue and the damaged blood vessels begin to regrow
name and describe the third step of deep wound healing? proliferative: the migratory phase intensifies
name and describe the fourth step of deep wound healing? maturation: the scab sloughs off, epidermis is restored to normal thickness, collagen fibers become more organized, fibroblasts decrease and the blood vessels are restore to normal.
what primary germ layer is the epidermis derived from? ectoderm
what primary germ layer is the dermis derived from? mesoderm
functions of vernix caseosa facilitates birth process and protects fetal skin
what does ABCD stand for in reference to skin cancer? A: assymmetry B: border C: color D: diameter
what are the 4 risk factors for skin cancer: 1. skin type 2. sun exposure 3. family history 4. age and immune status
what are 5 systemic effects of burns 1. loss of plasma proteins 2. shock 3. dehydration 4. sepsis 5. lowered immune responce
basal cell carcinoma, what is the rate of occurrence? 78%
squamous cell carcinoma, what is the rate of occurrence? 20%
malignant melanoma: what is the rate of occurrence? 2%
what is damaged in first degree burn? epidermis
what is damaged in second degree burn? epidermis and dermis
what is damaged in third degree burn? full thickness is damaged
what are 4 causes of burns heat, electricity, chemicals, radiation
name 4 fungal disorders where it occurs 1. tinea pedis (feet) 2. tinea corporis (body) 3. tinea versicolor, 4. tinea unguium (nails)
Created by: jguard423